Hells Half Acre Twenty-Mile Trailhead

Type

Trailhead

Town

Roberts · 20 mi from the town center

Location

43.55379, -112.44212 · Open map

Source

OpenStreetMap · checked October 2, 2026

Check the official page for hours, fees, access and closures before you go. Distances are straight-line miles. Place data © OpenStreetMap contributors (ODbL). See something wrong? Let us know. Thank you.

• Hells Half Acre Twenty-Mile Trailhead
• Trail
• Cave
• Park

Other parks, trails and things to do within 15 miles, nearest first.

• Lava Loop Trail0.9 mi long · near Roberts
  here
• 17 Mile Cavecave · near Shelley
  4.5 mi
• Hells Half Acre Wilderness Study Areanature reserve · near Shelley
  7.8 mi